<?php
/**
 * Nextcloud - News
 *
 * This file is licensed under the Affero General Public License version 3 or
 * later. See the COPYING file.
 *
 * @author Alessandro Cosentino <cosenal@gmail.com>
 * @author Bernhard Posselt <dev@bernhard-posselt.com>
 * @copyright Alessandro Cosentino 2012
 * @copyright Bernhard Posselt 2012, 2014
 */

namespace OCA\News\Service;

use \OCP\AppFramework\Db\DoesNotExistException;
use \OCP\AppFramework\Db\MultipleObjectsReturnedException;

use \OCA\News\Db\NewsMapper;


abstract class Service {

    protected $mapper;

    public function __construct(NewsMapper $mapper){
        $this->mapper = $mapper;
    }


    /**
     * Delete an entity
     * @param int $id the id of the entity
     * @param string $userId the name of the user for security reasons
     * @throws ServiceNotFoundException if the entity does not exist, or there
     * are more than one of it
     */
    public function delete($id, $userId){
        $entity = $this->find($id, $userId);
        $this->mapper->delete($entity);
    }


    /**
     * Finds an entity by id
     * @param int $id the id of the entity
     * @param string $userId the name of the user for security reasons
     * @throws ServiceNotFoundException if the entity does not exist, or there
     * are more than one of it
     * @return \OCP\AppFramework\Db\Entity the entity
     */
    public function find($id, $userId){
        try {
            return $this->mapper->find($id, $userId);
        } catch(DoesNotExistException $ex){
            throw new ServiceNotFoundException($ex->getMessage());
        } catch(MultipleObjectsReturnedException $ex){
            throw new ServiceNotFoundException($ex->getMessage());
        }
    }

}
